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Show Medal for Paving Blocks. " "An'advance in road paving tor which a British engineering firm has been awarded a bronze medal by the Royal Sanitary institute should be ol more than ordinary importance. Clinker residue from the collection and burning of house refuse is used for the paving blocks, and by special machinery is ground, thoroughly mixed with oil and Trinidad asphalt, and then pressed Into blocks 9 by 4 1-2 by 3 inches in size, each weighing about ten pounds. At the destructor works at Kensington more than five hundred blocks an hour are made. They are passed directly through a water-cooling process, and are then ready for immediate laying. Some ol the blocks under test have been laid over four years. They havb not only provided an exceedingly durable and noiseless pavement, but it Is claimed that they are sanitary and take little scavenging; that they do not become slippery, and that they are not lu any way affected by rain, frost, sunshlno or other ordinary conditions. |